![Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened : r/Office365 Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened : r/Office365](https://external-preview.redd.it/7Wg3jF5K4C_TAgcbZd7J-UdIpDSGFzpnFFY__4CBnFU.jpg?format=pjpg&auto=webp&s=e91b47a7d4f67b62389c84cf80e7860bd10e55c4)
Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened : r/Office365
![Outlook connector fails all of a sudden (The set of folders cannot be opened) | Kopano Community Forum Outlook connector fails all of a sudden (The set of folders cannot be opened) | Kopano Community Forum](https://forum.kopano.io/assets/uploads/files/1611769260648-connectorfailure.png)
Outlook connector fails all of a sudden (The set of folders cannot be opened) | Kopano Community Forum
cannot start microsoft outlook. cannot open the outlook window. the set of folders cannot be opened. You must connect to Microsoft Exchange at least once before you can use your Outlook data
![FIX] Cannot Start Microsoft Outlook. Cannot Open The Outlook Window. The Set Of Folders Cannot Be Opened. FIX] Cannot Start Microsoft Outlook. Cannot Open The Outlook Window. The Set Of Folders Cannot Be Opened.](https://htse.kapilarya.com/FIX-Cannot-Start-Microsoft-Outlook-Cannot-Open-The-Outlook-Window-The-Set-Of-Folders-Cannot-Be-Opened.png)
FIX] Cannot Start Microsoft Outlook. Cannot Open The Outlook Window. The Set Of Folders Cannot Be Opened.
![Solved: Outlook (Office 365) fatal error: Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. | Experts Exchange Solved: Outlook (Office 365) fatal error: Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. | Experts Exchange](https://filedb.experts-exchange.com/incoming/2019/05_w21/1421142/0018.jpg)
Solved: Outlook (Office 365) fatal error: Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. | Experts Exchange
![Cannot start microsoft outlook. Cannot open the outlook window. The set of folders cannot be opened. The information store could not be opened. - ITAdminGuide.com Cannot start microsoft outlook. Cannot open the outlook window. The set of folders cannot be opened. The information store could not be opened. - ITAdminGuide.com](https://itadminguide.com/wp-content/uploads/2018/05/outlook.jpg)